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Chemistry O Level Revision > Test For Halides > Flashcards

Test For Halides Flashcards

1
Q

What are halides?

A

Halides are compounds formed when halogens react with other elements, typically metals.

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2
Q

Which elements are considered halogens?

A

Fluorine, chlorine, bromine, iodine, and astatine.

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3
Q

True or False: Halides can only be formed with metals.

A

False. Halides can also form with nonmetals.

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4
Q

What is the general formula for halides?

A

MX, where M is a metal and X is a halogen.

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5
Q

Fill in the blank: The test for halides involves the addition of _______.

A

silver nitrate.

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6
Q

What color precipitate forms when silver nitrate is added to a chloride solution?

A

White precipitate.

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7
Q

What color precipitate indicates the presence of bromide?

A

Cream precipitate.

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8
Q

What color precipitate indicates the presence of iodide?

A

Yellow precipitate.

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9
Q

What is the reaction of silver nitrate with sodium chloride?

A

AgNO3 + NaCl -> AgCl (s) + NaNO3.

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10
Q

True or False: The test for halides is qualitative.

A

True.

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11
Q

What is the solubility of silver chloride in water?

A

Silver chloride is insoluble in water.

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12
Q

What happens to the precipitate of silver halides when ammonia is added?

A

The precipitate dissolves in ammonia, except for silver chloride.

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13
Q

Which halide is the least soluble in water?

A

Silver bromide.

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14
Q

What is the observation when testing for iodide ions with silver nitrate?

A

A yellow precipitate forms.

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15
Q

What is the confirmatory test for halides?

A

Addition of dilute nitric acid followed by silver nitrate.

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16
Q

Fill in the blank: The color of the precipitate formed by silver bromide is _______.

A

Cream.

17
Q

What are the three main types of halides?

A

Chlorides, bromides, and iodides.

18
Q

True or False: Halides are generally ionic compounds.

A

True.

19
Q

What is the typical pH of a halide solution?

A

Neutral, around pH 7.

20
Q

Which halide is most commonly used in photographic films?

A

Silver bromide.

21
Q

What is the effect of heating on silver halide precipitates?

A

They can decompose into their respective halogen and silver.

22
Q

What is a common application of halides?

A

Halides are used in the production of salts and as disinfectants.

23
Q

What does a white precipitate of silver chloride indicate?

A

The presence of chloride ions.

24
Q

Fill in the blank: Bromides are less reactive than _______.

A

chlorides.

25
Q

How can halides be distinguished from each other?

A

By observing the color of the precipitate formed with silver nitrate.

26
Q

What is the primary use of sodium chloride?

A

It is commonly used as table salt.

Chemistry O Level Revision (4 decks)

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